已知椭圆
.
(1)若过椭圆的一个焦点引两条互相垂直的弦
、
.求证:
是定值;
(2)若
、
在椭圆上且
.求证:
是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fdd1989149897babe496145a3812e49.png)
(1)若过椭圆的一个焦点引两条互相垂直的弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0556ce16fbbb02a803ea0ab2546ef706.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7df99fe6438442a9453fc0c57fb703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3eeae1143162b4d564f4b77e3f77cd8.png)
21-22高二·全国·课后作业 查看更多[5]
沪教版(2020) 选修第一册 精准辅导 第2章 2.2(3) 椭圆的性质(第2课时)江西省吉安市永丰县永丰中学2022-2023学年高二上学期期末考试数学试题(A)(已下线)第26讲 圆锥曲线中定值问题(1)安徽省安庆市田家炳中学2022-2023学年高二下学期第二届“校长杯”竞赛数学试题(已下线)第5讲:定点、定值、定直线问题【练】
更新时间:2022-09-07 19:47:18
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】已知
分别为椭圆
的右焦点、右顶点,
,点
为坐标原点,射线
与
的交点为
,且
.
(1)求
的方程;
(2)若直线
与
交于
两点(
在
的上方).
在轴
上的射线分别为
,且
,当
取得最大值时,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56bfbaabe3fa71658b68fe4a7f1ca5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a183cac4423ab04e7ecfd4fba1715f40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd8f6011cb5fce27802eba23ae431ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da1ad84e1f898acc2cd3b85478d170e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8274c2431438b727d0331dcb73e188.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8c5f1958fed328502749045ddd8539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a47c6b21d8a02d0f3d3feed0d004e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7c33e8171fdaecd23db3945ae8730d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac35b1e8a952aac4f4cdaaf02d868d04.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】如图,在圆
上任取一点
,过点
作
轴的垂线段
,
为垂足,点
在
的延长线上,且
,当点
在圆
上运动时,记点
的轨迹为曲线
(当点
经过圆与
轴的交点时,规定点
与点
重合).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/d508ce98-c5d4-4a08-83d7-b3338ad518b0.png?resizew=161)
(1)求曲线
的方程;
(2)过点
作圆
的切线
交曲线
于
两点,将
表示成
的函数,并求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141e6a3f9b4f43721382ef61805760da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/d508ce98-c5d4-4a08-83d7-b3338ad518b0.png?resizew=161)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439e95540157803d4ac3cf61a49f50a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2401bc9c26cc3b0b8384c7139bd58fff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2401bc9c26cc3b0b8384c7139bd58fff.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】已知椭圆E:
的左、右焦点分别为F1,F2,离心率为
,点A在椭圆E上,∠F1AF2=60°,△F1AF2的面积为4
.
(1)求椭圆E的方程;
(2)过原点O的两条互相垂直的射线与椭圆E分别交于P,Q两点,证明:点O到直线PQ的距离为定值,并求出这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a625c499f51d7320ce4fecb49e76adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求椭圆E的方程;
(2)过原点O的两条互相垂直的射线与椭圆E分别交于P,Q两点,证明:点O到直线PQ的距离为定值,并求出这个定值.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】已知椭圆
的左、右焦点分别是
,其离心率
,点
是椭圆C上一点.
(1)求椭圆C的标准方程;
(2)设
是椭圆C上的一动点,由原点O向
引两条切线,分别交椭圆C于点
,若直线
的斜率均存在,并分别记为
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940601d3b91f65c84380f073b14d1e4a.png)
(1)求椭圆C的标准方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5429a2c310fd3b2e7c52834ee0cfff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8247c4ccd989467d2d4e326142846a96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139c0ae68e597571ba72ef727fa9222c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
您最近一年使用:0次